Learning objective

Outline the characteristics of ionic compounds, including: (a) their high melting and boiling points, (b) their ability to conduct electricity when dissolved in water or melted, but not when solid, and (c) their general solubility in water.

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Cambridge IGCSE Combined ScienceAtoms, elements and compoundsCore content

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Outline the characteristics of ionic compounds, including: (a) their high melting and boiling points, (b) their ability to conduct electricity when dissolved in water or melted, but not when solid, and (c) their general solubility in water

This point belongs to Ions and ionic bonds, especially Ions and ionic bonds outcomes.
You need to be able to outline the characteristics of ionic compounds, including: (a) their high melting and boiling points, (b) their ability to conduct electricity when dissolved in water or melted, but not when solid, and (c) their general solubility in water.
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Describe

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Paper 3 structured question: Ions and ionic bonds

Paper 3Theory (Core)2 marks

Description

Properties of Ionic Compounds

Ionic compounds are known for their high melting and boiling points, ability to conduct electricity when dissolved in water or melted, and general solubility in water.

a
Outline the characteristics of ionic compounds.
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Aim for approximately 2 distinct marking points.
[2]

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Explain how positive ions, called cations, and negative ions, known as anions, are formed.
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Explain how ionic bonds are formed between elements from Group I and Group VII, using dot-and-cross diagrams to illustrate.
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Explain how ionic bonds are created between metallic and non-metallic ions, including the use of dot-and-cross diagrams for representation.
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Describe the giant lattice structure of ionic compounds, which consists of a regular pattern of alternating positive and negative ions, using sodium chloride as an example.
Ions and ionic bonds outcomes

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